nationals. plus, history is made at the british open. >> right now time to get another look at the question of the morning. according to a study out of berlin, people look younger when they do one of these things. is it a, whiten their teeth, b, smile, or c, exercise. >> facebook friend billy says it is all of the above and more. his way to look young? eat hillfully, take care of your body while smiling and leading a happy life. >> keep posting your guesses on our facebook page. we'll have the answer at 6:48. we'll be right back. [ male announcer ] where did all the obama stimulus money go?